package main

import "fmt"

func main()  {
	m := make(map[string]int)

	m["k1"] = 7
	m["k2"] = 13

	fmt.Println("map:",m)
	fmt.Println("k1 =>",m["k1"])
	fmt.Println("len:",len(m))

	delete(m,"k2")
	fmt.Println(m)

	// _,prs := m["k2"] //判断m["k2"]是否存在
	fmt.Println("prs:",prs)


}